"The cost effectiveness of upper gastrointestinal endoscopy" by Showstack and Schroeder, or the fallacy of hypothetical economics in gastrointestinal endoscopy.
D003362:Cost-Benefit Analysis; D004064:Digestive System; D004724:Endoscopy / Q000191:economics*; D005251:Fees, Medical; D006801:Humans; D014481:United States